Added VERY primitive Rounds to the game

Added the basics of round based play.
The rounds do not start until at least 2 players are in the game. Then
it goes through a series of rounds which do nothing but give the players
a new loadout and tell the player the purpose of each round.

THIS IS VERY BASIC! I EXPECT IT WILL BE CHANGED DRASTICALLY AT SOME
POINT.
My reasoning for pushing such a primitive version of the round system is
that soon our mechanics will be based around how the rounds interact,
and being able to have a base system will make decisions surrounding
these mechanics easier to make.